US10184514B2 - Bearing isolator seal with enhanced rotor drive coupling - Google Patents

Bearing isolator seal with enhanced rotor drive coupling Download PDF

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Publication number
US10184514B2
US10184514B2 US15/533,114 US201515533114A US10184514B2 US 10184514 B2 US10184514 B2 US 10184514B2 US 201515533114 A US201515533114 A US 201515533114A US 10184514 B2 US10184514 B2 US 10184514B2
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United States
Prior art keywords
rotor
stator
bearing isolator
shut
seal
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Active
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US15/533,114
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English (en)
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US20170370405A1 (en
Inventor
Robert Paul Bender
Jason C Ferris
William Eric Meyer, Jr.
Joseph Charles Barker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flowserve Pte Ltd
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Flowserve Management Co
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Publication date
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Priority to US15/533,114 priority Critical patent/US10184514B2/en
Assigned to FLOWSERVE MANAGEMENT COMPANY reassignment FLOWSERVE MANAGEMENT COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BARKER, Joseph Charles, FERRIS, JASON C, MEYER, William Eric, Jr, BENDER, Robert Paul
Publication of US20170370405A1 publication Critical patent/US20170370405A1/en
Application granted granted Critical
Publication of US10184514B2 publication Critical patent/US10184514B2/en
Assigned to FLOWSERVE PTE. LTD. reassignment FLOWSERVE PTE. LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FLOWSERVE MANAGEMENT COMPANY
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/768—Sealings of ball or roller bearings between relatively stationary parts, i.e. static seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3244—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with hydrodynamic pumping action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • F16J15/4476—Labyrinth packings with radial path
    • F16J15/4478—Pre-assembled packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • F16J15/42—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by centrifugal force

Definitions

  • the invention relates to bearing isolator seals, and more particularly, to bearing isolator seals that include a rotor coupled to a drive shaft.
  • Bearing isolator seals are commonly used in a variety of rotating shaft applications when it is necessary to exclude contaminants or process fluid from reaching internal mechanisms such as shaft support bearings, or from leaking out of a housing that is penetrated by the rotating shaft.
  • bearing isolator seals are used in bearing housings for pumps, motors, gearboxes and other pieces of rotating equipment.
  • the main purpose of a bearing isolator seal is to prevent the ingress of process fluid or other contaminants into the bearing, which can lead to premature failure of the lubrication and bearings. In fact, penetration by contaminants is the most common reason for rotating equipment failure.
  • lip seals and simple labyrinths have proven inadequate for preventing ingress of contamination into bearings.
  • the use of bearing isolator seals can extend rotating equipment lifespans by a factor of 2 to 5, as compared to the typical equipment lifespans when standard lip seals or simple labyrinths are used.
  • Bearing isolators use a stator in close proximity to a dynamic rotor to prevent the ingress of contamination.
  • Rotors are typically driven by the rotating shaft, and are usually coupled to the shaft by a drive O-ring that transmits torque from the shaft to the rotor.
  • the grip of the drive O-ring is critical to the stability of the rotor, and to the performance of the bearing isolator.
  • FIG. 1 An example of this approach is shown in FIG. 1 , which includes a single rotor drive ring 100 .
  • this approach does not provide sufficient rotor stability and performance.
  • a single drive O-ring may fail to maintain the alignment of the rotor with the stator to within acceptable tolerances for some applications.
  • some bearing isolators include 2 drive O-rings 200 , 202 in two separate grooves 204 , 206 .
  • This approach can provide better rotor alignment, stability and performance than a single drive O-ring, but significant elongation of the rotor is required to accommodate the two drive O-rings and grooves. Accordingly, this approach may not be suitable for applications that require a compact solution.
  • a bearing isolator seal provides enhanced coupling and stability of the rotor to the shaft, without undue loss of compactness, by providing at least two drive O-rings in a common retention groove. This approach provides grip strength and stability comparable to multiple-groove solutions, but in a smaller dimensional envelope.
  • Some embodiments take advantage of axial rotor misalignment to enhance a static shut off feature based on a shut off O-ring by including a tapered section in the interface between the rotor and stator, adjacent to the shut off O-ring.
  • the bearing isolator can accommodate an axial misalignment of up to 0.025′′.
  • Various embodiments include a unitization feature that holds the rotor and stator together during assembly.
  • the unitization feature provides an interference fit between a groove at the outer diameter of the rotor and a notch on the inner diameter of the stator. Chamfers on both the notch and the groove facilitate both assembly and disassembly when sufficient force is applied, while maintaining the unitization of the rotor and stator during assembly and operation.
  • the unitization feature also acts as an additional torturous path to restrict contaminant flow.
  • the present invention is a bearing isolator seal that includes a rotor surrounding a rotatable shaft, said rotatable shaft being configured to rotate about a rotation axis, a drive retention groove formed in an inward facing surface of the rotor abutting the shaft, a plurality of drive O-rings contained in the drive retention groove and compressed between the shaft and a top of the drive retention groove, the drive O-rings thereby rotationally coupling the rotor to the shaft, and a stator surrounding the shaft and configured to remain stationary when the rotor is rotating, the rotor and stator being configured to inhibit a flow of fluid between them.
  • a maximum permitted axial movement is at least 0.010 inches.
  • Certain embodiments further include a labyrinth passage between the rotor and the stator, the labyrinth passage being configured to expel at least one of fluid and particles from the labyrinth passage by centrifugal force when the rotor is rotating.
  • Some embodiments further include a shut off retention groove formed in an inward-facing surface of the rotor abutting an extension of the stator, and a shut off O-ring expandably located within the shut off retention groove and configured to rotate with the rotor, the shut off O-ring having an inner diameter that contracts against the stator extension when the rotor is stationary, and expands away from contact with the stator extension when the rotor is rotating.
  • the stator extension includes a tapered section that is configured such that interference between the tapered section and the shut off O-ring declines linearly as the rotor moves axially away from the stator.
  • the tapered section is tapered at an angle of between two degrees and thirty degrees from the rotation axis.
  • Certain embodiments further include a unitization feature that is configured to permit separation and combination of the rotor with the stator when sufficient force is applied, while holding the rotor and stator together during assembly of the static seal.
  • the unitization feature includes a chamfered rotor extension and a chamfered stator extension, the rotor and stator extensions being configured to come into contact with each other when the rotor is shifted axially to a maximum permitted axial misalignment, and to thereby inhibit further axial movement of the rotor.
  • the unitization feature provides an additional torturous path to further inhibit the flow of fluid between the rotor and the stator.
  • FIG. 1 is a perspective view of a bearing isolator seal of the prior art that includes a single drive O-ring;
  • FIG. 2 is a cross-sectional view of a bearing isolator seal of the prior art that includes two drive O-rings in separate retention grooves;
  • FIG. 3A is a cross-sectional view of an embodiment of the present invention.
  • FIG. 3B is a cross-sectional view of an embodiment similar to FIG. 3A , but adapted to accommodate and take advantage of axial misalignment, where the embodiment is shown without any axial misalignment;
  • FIG. 4A is a cross-sectional view of an embodiment similar to FIG. 3B , but including a unitization feature, where the embodiment is shown without any axial misalignment;
  • FIG. 4B is a cross-sectional view of the embodiment of FIG. 4A , shown with an axial misalignment equal to the maximum permitted misalignment;
  • FIG. 4C is a perspective view of a portion of the stator of FIG. 4A , showing a contour of the unitization feature.
  • the present invention is a bearing isolator seal that provides enhanced rotor shaft coupling and stability, without undue loss of compactness, by providing at least two drive O-rings 314 , 316 in a common retention groove 318 .
  • This approach provides grip strength and rotor/shaft alignment stability that is comparable to multiple-groove solutions (see FIG. 2 ), but in a smaller dimensional envelope.
  • the embodiment illustrated in FIG. 3A further includes a static shut off feature that seals the air gap 310 between the rotor 304 and the stator 300 when the equipment is not running.
  • the shut off feature includes a shut off O-ring 306 that rotates with the rotor 304 and surrounds an extension 322 of the stator 300 .
  • the shut off O-ring 306 is expanded by centrifugal force away from the stator extension 322 and into a space provided above the shut off O-ring 306 in the shut off retention groove 308 , so that the shut off O-ring 306 does not interfere with rotation of the rotor 304 relative to the stator 300 .
  • the shut off O-ring 306 contracts and seals against the stator extension 322 , so as to seal the gap between the rotor 304 and the stator 300 .
  • the bearing isolator seal also includes labyrinth technology 310 that further enhances the exclusion of contaminants.
  • labyrinth technology 310 that further enhances the exclusion of contaminants.
  • a close radial clearance 312 is maintained between the rotor 304 and stator extension 322 to maximize the effectiveness of the labyrinth technology 310 .
  • FIG. 3B is a cross-sectional illustration of an embodiment similar to FIG. 3A , except that the embodiment of FIG. 3B accommodates and takes advantage of rotor misalignment.
  • the stator 300 of the bearing isolator seal includes a tapered section 302 located in an inboard region of the stator extension 322 , adjacent to the shut off O-ring 306 . Because FIG. 3B is a cross-sectional illustration, the tapered section 302 appears as in inclined section.
  • the shut off O-ring's nominal inside diameter is pressed against the tapered section 302 of the stator 300 , forming an enhanced static seal.
  • the angle of the tapered section 302 is toward the rotor 304 , which biases the shut off O-ring 306 against the shut off O-ring's containment groove 308 on the rotor 304 , enabling the static seal when no misalignment is present.
  • FIG. 4A is a cross-sectional illustration of an embodiment similar to FIG. 3B , except that it also includes a unitization feature that holds the rotor 304 and stator 300 together during assembly and operation.
  • the unitization feature provides an interference fit between a groove 402 at the outer diameter of the rotor 304 and a notch 400 on the inner diameter of the stator 300 .
  • Chamfers on both the notch 400 and the groove 402 facilitate both assembly and disassembly when sufficient force is applied, while maintaining the unitization of the rotor 304 and stator 300 during assembly.
  • the unitization feature also acts as an additional torturous path to restrict contaminant flow.
  • the rotor 304 is illustrated in its fully aligned, at-rest position.
  • FIG. 4B is a cross-sectional illustration of the embodiment of FIG. 4A , shown with the rotor positioned at its maximum permitted axial misalignment. It can be seen in the figure that the groove 402 and notch 400 of the unitization feature have come into contact with each other, such that the ingress of contaminants is further inhibited, and such that further axial movement of the rotor 304 is prevented.
  • FIG. 4C is a perspective sectional illustration of the unitization feature of FIG. 4A .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
US15/533,114 2014-12-18 2015-12-18 Bearing isolator seal with enhanced rotor drive coupling Active US10184514B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/533,114 US10184514B2 (en) 2014-12-18 2015-12-18 Bearing isolator seal with enhanced rotor drive coupling

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201462093856P 2014-12-18 2014-12-18
PCT/US2015/066578 WO2016100771A1 (fr) 2014-12-18 2015-12-18 Joint d'étanchéité d'isolateur de palier a accouplement d'entraînement de rotor amélioré
US15/533,114 US10184514B2 (en) 2014-12-18 2015-12-18 Bearing isolator seal with enhanced rotor drive coupling

Publications (2)

Publication Number Publication Date
US20170370405A1 US20170370405A1 (en) 2017-12-28
US10184514B2 true US10184514B2 (en) 2019-01-22

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Application Number Title Priority Date Filing Date
US15/533,114 Active US10184514B2 (en) 2014-12-18 2015-12-18 Bearing isolator seal with enhanced rotor drive coupling

Country Status (5)

Country Link
US (1) US10184514B2 (fr)
EP (1) EP3234417B1 (fr)
CA (1) CA2969760C (fr)
MX (1) MX375605B (fr)
WO (1) WO2016100771A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107806505B (zh) * 2017-12-12 2024-01-05 重庆望江工业有限公司 一种风电齿轮箱输出轴密封结构
WO2021034720A1 (fr) * 2019-08-16 2021-02-25 Amsted Rail Company, Inc. Joint d'étanchéité à labyrinthe, doté de rotor de verrouillage et de pièce rapportée de boîtier d'étanchéité
CN111654149B (zh) * 2020-05-19 2021-09-28 格力电器（杭州）有限公司 一种轴连接结构及电机

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743034A (en) 1987-03-27 1988-05-10 Durametallic Corporation Labyrinth bearing protector seal
US4989883A (en) * 1989-06-14 1991-02-05 Inpro Companies, Inc. Static and dynamic shaft seal assembly
US5069461A (en) * 1989-06-14 1991-12-03 Inpro Companies, Inc. Static and dynamic shaft seal assembly
US5221095A (en) 1989-06-14 1993-06-22 Inpro Companies, Inc. Static and dynamic shaft seal assembly
US5378000A (en) * 1992-10-19 1995-01-03 Inpro Companies, Inc. Shaft seal assembly
JPH074441A (ja) 1993-01-15 1995-01-10 Inpro Co Inc 整合装置
US5957462A (en) 1996-05-17 1999-09-28 Toyota Jidosha Kabushiki Kaisha Seal structure between a rotatable member and a stationary member
US6062568A (en) 1997-07-10 2000-05-16 Orlowski; David C. Bearing isolator with air purge
US20010025831A1 (en) 2000-03-30 2001-10-04 Brother Kogyo Kabushiki Kaisha Sealing apparatus used in a wire cut electric discharge machine
US6311984B1 (en) * 1996-08-21 2001-11-06 Inpro Companies, Inc. Bearing isolator
US20020167131A1 (en) * 1999-10-28 2002-11-14 David C. Orlowski Bearing isolator
US7052014B1 (en) 1999-02-04 2006-05-30 Orlowski David C Snap together bearing isolator
US20070029736A1 (en) * 2005-08-05 2007-02-08 Roddis Alan J Bearing protector
US20070138748A1 (en) * 2005-06-25 2007-06-21 Orlowski David C Motor ground seal
US20080063330A1 (en) * 2006-09-07 2008-03-13 Orlowski David C Bearing monitoring method
US20110204734A1 (en) 2005-06-25 2011-08-25 Orlowski David C Motor Grounding Seal
US20140183998A1 (en) * 2005-06-25 2014-07-03 Inpro/Seal Llc Current Diverter Ring
US20140333031A1 (en) 2009-11-11 2014-11-13 Garlock Sealing Technologies, Llc Flooded bearing isolator
US20150198252A1 (en) * 2014-01-10 2015-07-16 Flowserve Management Company Bearing isolator seal for rotating shaft
US20160208857A1 (en) * 2013-08-20 2016-07-21 Aes Engineering Ltd. Bearing isolator
US9831739B2 (en) * 2012-06-18 2017-11-28 Inpro/Seal Llc Explosion-proof current diverting device

Patent Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743034A (en) 1987-03-27 1988-05-10 Durametallic Corporation Labyrinth bearing protector seal
US4989883A (en) * 1989-06-14 1991-02-05 Inpro Companies, Inc. Static and dynamic shaft seal assembly
US5069461A (en) * 1989-06-14 1991-12-03 Inpro Companies, Inc. Static and dynamic shaft seal assembly
US5221095A (en) 1989-06-14 1993-06-22 Inpro Companies, Inc. Static and dynamic shaft seal assembly
EP0489604A1 (fr) 1990-12-05 1992-06-10 Inpro Companies, Inc. Assemblage d'étanchéité d'arbres statique et dynamique
US5378000A (en) * 1992-10-19 1995-01-03 Inpro Companies, Inc. Shaft seal assembly
JPH074441A (ja) 1993-01-15 1995-01-10 Inpro Co Inc 整合装置
US5957462A (en) 1996-05-17 1999-09-28 Toyota Jidosha Kabushiki Kaisha Seal structure between a rotatable member and a stationary member
US6311984B1 (en) * 1996-08-21 2001-11-06 Inpro Companies, Inc. Bearing isolator
US6062568A (en) 1997-07-10 2000-05-16 Orlowski; David C. Bearing isolator with air purge
US7052014B1 (en) 1999-02-04 2006-05-30 Orlowski David C Snap together bearing isolator
US20020167131A1 (en) * 1999-10-28 2002-11-14 David C. Orlowski Bearing isolator
US6583376B2 (en) * 2000-03-30 2003-06-24 Brother Kogyo Kabushiki Kaisha Sealing apparatus used in a wire cut electric discharge machine
US20010025831A1 (en) 2000-03-30 2001-10-04 Brother Kogyo Kabushiki Kaisha Sealing apparatus used in a wire cut electric discharge machine
US20070138748A1 (en) * 2005-06-25 2007-06-21 Orlowski David C Motor ground seal
US20110101618A1 (en) 2005-06-25 2011-05-05 Orlowski David C Motor Grounding Seal
US20110204734A1 (en) 2005-06-25 2011-08-25 Orlowski David C Motor Grounding Seal
US20140183998A1 (en) * 2005-06-25 2014-07-03 Inpro/Seal Llc Current Diverter Ring
US20070029736A1 (en) * 2005-08-05 2007-02-08 Roddis Alan J Bearing protector
US20080063330A1 (en) * 2006-09-07 2008-03-13 Orlowski David C Bearing monitoring method
US20140333031A1 (en) 2009-11-11 2014-11-13 Garlock Sealing Technologies, Llc Flooded bearing isolator
US9831739B2 (en) * 2012-06-18 2017-11-28 Inpro/Seal Llc Explosion-proof current diverting device
US20160208857A1 (en) * 2013-08-20 2016-07-21 Aes Engineering Ltd. Bearing isolator
US20150198252A1 (en) * 2014-01-10 2015-07-16 Flowserve Management Company Bearing isolator seal for rotating shaft

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Title
Extended European Search Report of European Application No. EP15871142.4 dated Jul. 9, 2018, 5 pages.
International Preliminary Report on Patentability of PCT Application PCT/US2015/064422, dated 170613, 7 pages.
PCT Search Report for PCT Application No. PCT/US2015/064422, dated Mar. 12, 2016, 10 pages.
PCT Search Report for PCT Application No. PCT/US2015/066578, dated Mar. 21, 2016, 13 pages.

Also Published As

Publication number Publication date
EP3234417A4 (fr) 2018-08-15
US20170370405A1 (en) 2017-12-28
CA2969760C (fr) 2020-11-24
CA2969760A1 (fr) 2016-06-23
WO2016100771A1 (fr) 2016-06-23
MX2017008003A (es) 2017-10-18
EP3234417A1 (fr) 2017-10-25
EP3234417B1 (fr) 2019-06-19
MX375605B (es) 2025-03-06

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